Boulder – 865

$ 15,680.00

Product Description

Boulder – 865 integrated amplifier.

High-performance sound had always meant separate components, a lot of cables and large space requirements.

Simple, integrated solutions fell short of the mark when it came to sound quality. In short, convenience came with compromise.

Until Boulder’s 865.

Features:

Massive, shielded, toroidal transformer and multiple filter capacitors for immediate power transfer.

Efficient heatsink design means high power in a small chassis without excessive heat.

Four pairs of inputs, each capable of custom configuration and naming.

One pair of auxiliary outputs that can be set for fixed (to drive secondary systems) or variable operation

(to drive a subwoofer or additional amplifier).

Fully balanced input circuitry for maximum resolution and sound quality.

Rugged, easy-to-connect, high-current speaker terminals require no tools.

Supervising microprocessor controls all preamplifier functions, monitors protection circuits, and communicates with other Boulders.

Input and preamplifier sections are housed in steel casework to eliminate interference from other portions of the amplifier.

Boulder’s own precision stepped volume control, the same as in the 2010 preamplifier.

865 – Specifications:

CONTINUOUS OUTPUT POWER, 8 / 4 OHMS – 150W

PEAK OUTPUT POWER – 300W into 4 ohms

BALANCED LINE INPUTS – 4 pairs

AUXILIARY BALANCED OUTPUTS – 1 pair (switchable: fixed or variable)

LOUDSPEAKER OUTPUT CONNECTORS – 1 pair/channel,

6 mm/.250-inch wingscrews

THD AT CONTINUOUS POWER – 

20 Hz to 2 kHz: 0.0035%, 20 kHz: .018%

SIGNAL-TO-NOISE RATIO (RE: 150W/8 OHMS) –

-108 dB, unweighted, 20 Hz to 22 kHz

FREQUENCY RESPONSE, 20 TO 20 KHZ – +0.00, -0.07 dB

FREQUENCY RESPONSE, – 3 DB – 0.015 Hz, 95 kHz

MAXIMUM INPUT LEVEL – 6.0 Vrms

INPUT IMPEDANCE – 100 kΩ balanced, 50 kΩ unbalanced

COMMON MODE REJECTION (BALANCED ONLY) – 

60 Hz: 90 dB, 10 kHz: 70 dB

CROSSTALK, L TO R OR R TO L

-112 dB or better, 20 Hz to 20 kHz

CROSSTALK, ADJACENT INPUTS

-112 dB or better, 20 Hz to 20 kHz

VOLUME – 100 dB range in 0.5 dB steps

MAXIMUM VOLTAGE GAIN – 46 dB

GAIN AT AUXILIARY OUTPUTS –

Balanced: +4 dB, unbalanced: +2 dB

CONTROL SYSTEMS SUPPORTED –

Boulder Link, 12V Trigger In & Out

POWER REQUIREMENTS –

100, 120 220-240 VAC, 50-60 Hz

3W Standby, 850W maximum

WEIGHT – Amplifier: 47 lbs. (21.3 kg)

Shipping: 54 lbs. (24.5 kg)

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